Simplify conditions to render a banner

spec/components/shared/banner_component_spec.rb

@@ -0,0 +1,15 @@
+require "rails_helper"
+
+describe Shared::BannerComponent, type: :component do
+  it "renders given a banner" do
+    render_inline Shared::BannerComponent.new(create(:banner, title: "Vote now!"))
+
+    expect(page.find(".banner")).to have_content "Vote now!"
+  end
+
+  it "does not render anything given nil" do
+    render_inline Shared::BannerComponent.new(nil)
+
+    expect(page).not_to have_css ".banner"
+  end
+end